Patent US2531953A successfully refreshed from Google Patents.
US4413359A
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Impermeable laminate membrane
Assignee: Koken Co Ltd
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Filing: 1982-02-26
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Granted: 1983-11-08
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Expires: 2002-02-26
Abstract
Abstract An impermeable laminated membrane, constructed by the superposition of a silicone rubber membrane on a fluoro-rubber membrane, is disclosed. This laminated membrane has an extremely low permeability so that its is effective for implantation into living organisms.
Inventors
- 👤 Taichiro Akiyama
- 👤 Fumio Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/12; A61L; A61L27/00; A61L27/14; A61L27/16; Y; Y10; Y10S; Y10S128/00; Y10S128/14; Y10S128/21; Y10S525/00; Y10S525/937; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
An implantable impermeable laminate membrane bag for use in living organisms comprising a laminate of at least one membrane of a cured dimethylsiloxane polymer and at least one membrane of a vinylidene fluoride-hexafluoropropylene-based fluororubber.
Claim 2
Dependent Claim
34 words
An implantable impermeable laminate membrane bag for use in living organisms comprising a laminate of at least one membrane of a cured dimethylsiloxane polymer and at least one membrane of a vinylidene fluoride-hexafluoropropylene-based fluororubber.
Claim 3
Dependent Claim
19 words
The impermeable laminate membrane bag according to claim 1, further comprising an additional membrane of the cured dimethylsiloxane polymer.
Claim 4
Dependent Claim
30 words
The impermeable laminate membrane bag according to claim 1 or 2 wherein the membrane of the vinylidene fluoride-hexafluoropropylene-based fluororubber is interposed between the two membranes of the cured dimethylsiloxane polymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |